Should I have received an email after registering for self-assessment online (SA1)?

As the title says. I'm fairly sure, although not 100%, that I registered a few weeks ago but still haven't received a letter with my UTR. I checked my email to see if there was any confirmation of me registering for self-assessment, but I couldn't find anything. Does this mean I didn't actually register, or was there not supposed to be any email confirmation? Thanks.

Hi,

There should be an email confirmation once the registration has been submitted. Please contact our Self Assessment team to check if a record has been created.

Self Assessment: general enquiries

Thank you.